# Higgs characterisation at NLO in QCD: CP properties of the top-quark Yukawa interaction

The European Physical Journal C, Sep 2014

At the LHC the CP properties of the top-quark Yukawa interaction can be probed through Higgs production in gluon fusion or in association with top quarks. We consider the possibility for both CP-even and CP-odd couplings to the top quark to be present, and study CP-sensitive observables at next-to-leading order (NLO) in QCD, including parton-shower effects. We show that the inclusion of NLO corrections sizeably reduces the theoretical uncertainties, and confirm that di-jet correlations in $$H+2$$ jet production through gluon fusion and correlations of the top-quark decay products in $$t\bar{t}H$$ production can provide sensitive probes of the CP nature of the Higgs interactions.

This is a preview of a remote PDF: https://link.springer.com/content/pdf/10.1140%2Fepjc%2Fs10052-014-3065-2.pdf

Federico Demartin, Fabio Maltoni, Kentarou Mawatari, Ben Page, Marco Zaro. Higgs characterisation at NLO in QCD: CP properties of the top-quark Yukawa interaction, The European Physical Journal C, 2014, 3065, DOI: 10.1140/epjc/s10052-014-3065-2